Progression
# Progression

Progression may refer to:

In mathematics:

* Arithmetic progression, sequence of numbers such that the difference of any two successive members of the sequence is a constant
* Geometric progression, sequence of numbers such that the quotient of any two successive members of the sequence is a constant
* Harmonic progression (mathematics), sequence of numbers such that their reciprocals form an arithmetic progression

In music:

* Chord progression, series of chords played in order
   * Backdoor progression, the cadential chord progression from iv7 to I, or flat-VII7 to I in jazz music theory
   * Omnibus progression, sequence of chords which effectively divides the octave into 4 equal parts
   * Ragtime progression, chord progression typical of ragtime music and parlour music genres
* Progression, music software for guitarists
* Progression, Markus Schulz's second Artist Album, released in 2007

In other fields:

* Age progression, the process of modifying a photograph of a person to represent the effect of aging on their appearance
* Cisternal progression, theory of protein transport through the Golgi apparatus inside a cell
* Color progression, ranges of color whose values transition smoothly through a hue, saturation, luminance, or any combination of the three
* Horizontal progression, the gradual movement from left to right during writing a line of text in Western handwriting
* A progressive tax is a tax by which the tax rate increases as the taxable amount increases
* Semantic progression, evolution of word usage
* Educational progression, an individual's movement through stages of education and/or training
* Progress tracking in video games
* Astrological progression, used in Horoscopic astrology to forecast future trends and developments.
